Frame structure of baby carriage



FIG. 1 is a front view of a frame structure of baby carriage showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a perspective view thereof showing the folded state. 

The ornamental design for frame structure of baby carriage, as shown and described. 